function checkMacOs() {
    var _nu = navigator.userAgent;
    if (_nu.indexOf('Mac') != -1) {
        return true;
    }
    return false;
}

function checkChromeBrowser() {
    var _nu = navigator.userAgent;
    if (_nu.indexOf('Chrome') != -1) {
        return true;
    }
    return false;
}

if (checkMacOs()) {
    $('#ctrlDiv').hide();
}

if (checkChromeBrowser()) {
    $('#_ocx_password')
        .bind('mouseover', function () {
            timer = setTimeout(function () {
                $("#loginpwd_error").empty();
                $("#loginpwd_error").removeClass().addClass("hide");
            }, 380);
        })
        .bind('mouseout', function () {
            clearTimeout(timer);
        });
}

function checkOsAndBrowser() {
    var _nu = navigator.userAgent,
        _os = {
            Win: _nu.indexOf('Win') != -1,  //Window OS
            Mac: _nu.indexOf('Mac') != -1,  //Mac OS
            X11: _nu.indexOf('X11') != -1,  //X Window系统

            Firefox: _nu.indexOf('Firefox') != -1, //Firefox浏览器
            IE: _nu.indexOf('MSIE') != -1, //ie浏览器
            Safari: _nu.indexOf('Safari') != -1, //Safari浏览器
            Opera: _nu.indexOf('Opera') != -1, //Opera浏览器
            Chrome: _nu.indexOf('Chrome') != -1, //Chrome浏览器

            Gecko: _nu.indexOf('Gecko') != -1, //Gecke内核
            Trident: _nu.indexOf('Trident') != -1, //Trident内核
            webkit: _nu.indexOf('WebKit') != -1, //WebKit内核
            Presto: _nu.indexOf('Presto') != -1 //Presto内核
        }
    return _os;
}